[(1+2)*3-4]/5=1
(1*2+3-4+5)/6=1
[(1+2)*3/(4+5)+6]/7=1
[(1+2)/3*(4+5+6)-7]/8=1
(1*2+3+4-5+6+7-8)/9=1
[(1+2)*3-4]/5=1
[1*(2+3)-4+5]/6=1
[(1+2)*3/(4+5)+6]/7=1
(1+2)/3*(4+5+6-7)/8=1
1*2+3+4/5+6+7-8/9=1
(2)(105+87)*3-64=512
(3)(0.68+1.2)*2+0.09=3.85